Locking cannula



FIG. 1 is a bottom perspective view of a locking cannula showing our newdesign;

FIG. 2 is a left side elevational view, the right side being a mirrorimage thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view, the rear elevational view being amirror image thereof; and,

FIG. 5 is a bottom plan view thereof.

The ornamental design for a locking cannula, as shown and described.